First slide

Travelling wave

Question

The correct graph between the frequency n and square root of density ( $ρ$ ) of a wire, keeping its length, radius and tension constant, is

Moderate

A
B
C
D

Solution

We know frequency $n = \frac{p}{2 l} \sqrt{\frac{T}{{πr}^{2} ρ}} \Rightarrow n \propto \frac{1}{\sqrt{ρ}}$
i.e., graph between n and $\sqrt{ρ}$ will be hyperbola.

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